First of all, this is my first post - thank you all for being awesome and opening my eyes to what I know will soon be an obsession!
My question is simple - is this mold? I lifted the bottle up, and see similar "white circular growth" on the bottom as well; so I'm not sure if it's yeast growth or something more nefarious!
This is my first batch of Apfelwein (1 gallon, using ~1/4th the recommended Montrachet yeast packet, ~.3lbs corn sugar), and only my second fermentation so it's likely user error, but I just wanted to get some verification!